| |
| |
| |
|
Page: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Comments:
<0> srepfler - if you mean 'showing its work step-by-step', then no, not in general.
<1> srepfler: yes, with Trace
<0> Is that useful?
<1> I'm not so sure it is
<1> probably in some situations
<0> % Trace[Integrate[Sin[x^2] Log[x^3], x]]
<2> Catfive: {{HoldForm[Sin[x^2]*Log[x^3]], HoldForm[Log[x^3]*Sin[x^2]]}, HoldForm[Integrate[Log[x^3]*Sin[x^2], x]], HoldForm[((-3*I)/4)*(2*x*HypergeometricPFQ[{1/2, 1/2}, {3/2, 3/2}, (-I)*x^2] - 2*x*
<2> HypergeometricPFQ[{1/2, 1/2}, {3/2, 3/2}, I*x^2] + (-1)^(3/4)*Sqrt[Pi]*(Erf[(-1)^(1/4)*x] - Erfi[(-1)^(1/4)*x])*Log[x]) + Sqrt[Pi/2]*FresnelS[Sqrt[2/Pi]*x]*(-3*Log[x] + Log[x^3])]}
<1> but if I get it right it does not help, in steps, to differentiate Sin[x^2] or similar
<0> yeah, not really. :)
<0> there are some packages designed for education specifically to do that; there's one for differentiation, for instance.
<3> that go with mathematica or are extra packages?
<4> what is the derivative of this ? (ln(x))^2 * (e^x + sin(x))
<4> for the first term do i pose x^a = ax^a-1 ?
<4> i think i do
<1> anubiss: rather: derivative of (f(x))^2 is 2 f(x) f'(x)
<4> then whats the derivative of sin(x)
<1> or in general: derivative of f(x)^n is n f(x)^(n-1) f'(x)
<4> so thats 2ln(x)
<1> no
<1> 2 ln(x) times the derivative of ln(x)
<4> thats my whole answer ?
<1> no
<1> for the whole thing, note that you have a product, and use the product rule
<4> mmm
<4> so i treat the 2 term separately
<0> srepfler - http://library.wolfram.com/webMathematica/Education/WalkD.jsp
<2> Title: Step-by-Step Derivatives, http://tinyurl.com/yejbb8
<5> sorry
<5> whats the link for me ?
<3> no for me
<5> that step by step derivative
<3> I didn't ask for quite that, but I appreciate it :)
<5> how do i write square root 1+x in wolfram ?
<6> anubiss_: Sqrt[1+x]
<6> % Integrate[Ln[x]/(1+x^19),x]
<2> excelblue: Integrate[Ln[x]/(1 + x^19), x]
<3> I being a programmer miss stuff like code completion in Mathematica
<5> thanks
<3> it's just odd that they didn't add it yet
<5> is this correct ?
<5> (ln[x]^2) * (e^x + sin[x])
<5> for wolfram
<5> so the derivative of e^x is still e^x
<7> MECU: one warning, if you are using the gimp animation plug-in you want to have a lot of RAM, a gig or more
<7> whoops, wrong channel
<8> % solve [sqrt: 234567]
<2> SonicChao: solve[sqrt:234567]
<8> :/
<9> simplify maybe?
<8> % solve [sqrt(234567)]
<2> SonicChao: solve[234567*sqrt]
<8> %solve [sqrt(234567)]
<9> % simplify[sqrt[234567]]
<2> Smad2: simplify[sqrt[234567]]
<9> lol
<8> Lol :P
<8> I'm trying to do the Square Root Algorithm.
<8> And it's not going so well :P
<9> =P
<9> the digit by digit one?
<8> I think so.
<8> I'm at '48' and didnt understand what to do after that...
<7> sonic, which one?
<8> The one explained at the top of http://www.geocities.com/cnowlen/Cathy/Emat4680/Squareroot.htm
<2> http://tinyurl.com/y8uzde
<7> is it the one that sorta looks like long division?
<8> Yes
<5> (ln^2)(sin(Sqrt[1+x])
<5> whats wrong here
<7> fine, it's based on (a+b)^2=a^2+2ab+b^2=a^2+(2a+b)b
<8> The square root thing?
<7> yes
<8> erm...
<7> check out
<7> http://www.homeschoolmath.net/teaching/sqr-algorithm-why-works.php
<2> Title: Why the square root algorithm works, http://tinyurl.com/74daf
<5> help
<5> (ln^2)(sin(Sqrt[1+x])
<5> wolfram wont take this
<10> anubiss_: Maybe because you're not writing it according to Mathematica syntax.
<8> Ok
<5> i know, but whats wrong?
<10> > Log[Log[Sin[Sqrt[1+x]]]]]
<2> Parse error
<8> ah ha! :D
<10> > Log[Log[Sin[Sqrt[1+x]]]]
<2> Not in scope: `x'
<10> > Diff[Log[Log[Sin[Sqrt[1+x]]]],x]
<2> Not in scope: `x'
<10> > D[Log[Log[Sin[Sqrt[1+x]]]],x]
<2> Not in scope: `x'
<10> > Maximize[Log[Log[Sin[Sqrt[1+x]]]],{x}]
<2> Parse error
<10> grmbl.... Never mind then.
<0> try %
<5> then, the derivative of: (ln^2)(sin(Sqrt[1+x]) is ln(cos(Sqrt[1+x])) / Sqrt[1+x] ?
<8> I got to 484, right? But now I do not know what to do after the decimal.
<8> Or to calculate the decimal using the sqrt algorithm.
<7> sonic: forget the algorithm. screw it. how you YOU find a sqrt?
<8> Calculator usually :P
<7> go with god
<8> :P
<9> sonic i dont know the algo, but you should be able to find the digits about the decimal
<9> if you're finding sqrt[x], try finding sqrt[100x]
<9> then you'll get an extra digit :P
<8> Heh...
<9> the site shows an example of getting the decimal point =/
<9> just take down 00
<8> But I don't get it D:
<8> I'm not that smart :P
<8> ah. So THEN, my numbers will make sense
<8> XD ty
<11> Hm what's the intgrate for the following crap , ops function : ((n^(4))*x)/(e^((n^2)*)
<12> really ugly
<7> govner: what's with the * on the end, and what are you d's? dx? dn? dxdn? de?
<13> isn't sqrt(ab)=sqrt(a)*sqrt(b)?
<9> for positive reals a b :p
<7> Manyfold: trolling are you? never expected that
<14> anyone here familiar with SBP operators and SAT b.c. (semi descrete form of a PDE)
<11> TRWBW3 ops : ((n^(4))*x)/(e^((n^2)*x)
<11> anyone ?
<6> govner: you're integrating with respect to?
<11> yes yes lots of respect towards this crap :P
<15> heh
<11> |Steve| instead of heheing how about helping me with this you know what..
<0> govner, what's an antiderivative of f(x) = x/e^(ax) ?
<15> How about you answer excelblue's question.
<6> are you integrating with respect to n, x, or even treating 2 or 4 as a constant?
<15> (Don't let the presence of the interrogative fool you. The absence of the question mark should make it clear I wasn't asking a question.)
<11> hm
<11> i thought you were laughing :X
<6> at the end, does it say dn, dx, d2, d4?
<11> n is a constant i believe
<6> or even something like de
<6> heh... what does the whole equation look like on the paper...
<7> i once worked on a piece of numerical physics code where the original progammer #define'd TWO to 2 and THREE to 3. i guess he figured he wanted to code to be flexible enough to run for alternative values of three
<6> so you have the S for the integral, the formula, and what's at the end?
<15> You're also missing a parenthesis.
<11> g(x)=(n^4 * x )/ (e^(n^2 *x))
<6> dx, dn?
<11> that's it excelblue
<7> it's iggy time
<11> iggy ?
<6> alright, and you need to integrate g(x)?
<11> i dont think so
<11> first time i come across something that has crap in base and counter :X
<6> so... what are you to do with g(x)?
<6> or what do you need to do with it?
<11> i need to integrate it
Return to
#math
or
Go to some related
logs:
how to install dansguardian with coLinux
undefined function: ctype_alpha() php.ini
XARRAGON
the quickining
#perl
#ldap
why is mysql showing amounts in the wrong order
#ai
ENL832-TX-RENT ubuntu
#perl
|
|